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Statistics Dictionary

To see a definition, select a term from the dropdown text box below. The statistics
dictionary will display the definition, plus links to related web pages.

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Bias

Bias refers to the tendency of a measurement process to over- or
under-estimate the value of a population
parameter.
In survey sampling,
for example, bias would be the tendency of a sample
statistic
to systematically
over- or under-estimate a population parameter.